Paintbrush



FIG. 1 is a front elevation view of a paintbrush showing my new design;

FIG. 2 is a rear elevation view thereof;

FIG. 3 is a left side view thereof;

FIG. 4 is a right side view thereof;

FIG. 5 is a top plan view thereof;

FIG. 6 is a bottom plan view thereof;

FIG. 7 is a perspective view thereof; and,

FIG. 8 is another perspective view thereof.

The broken lines depict portions of a paintbrush in which the design isembodied that form no part of the claimed design.

CLAIM The ornamental design for a paintbrush, as shown and described.